Enclosure for electrical sensor

Abstract

An enclosure for a transducer includes a cylindrical housing and an end cap covering one end of the housing. A coupling ring engages an annular projection on the one end of the housing and a threaded portion of the end cap to hold the two elements in an abutting relationship. The housing has a threaded aperture therethrough. One of a series of different types of plumbing fittings, each having a common threaded projection, has the threaded projection received in the aperture of the housing. The end cap has a threaded aperture therethrough with one of a series of different types of electrical couplings received therein. Each of the couplings of the series has a common threaded projection which is adapted to mate with the end cap aperture. A set of stops is provided to prevent the end cap and the housing from rotating more than 360 degrees with respect to each other.

We claim: 
     
       1. A sensor comprising: a housing having a cylindrical end portion that includes a sealing surface and said housing has a threaded aperture therethrough;   a transducer located within said housing;   a cap having a cylindrical portion abutting the sealing surface and having external threads on its cylindrical portion;   a coupling ring engaging the end portion of said housing and having threads which engage the external threads of the cap; and   a plumbing fitting having a threaded tubular portion that is received in the aperture of said housing, the fitting being selected from a plurality a different types of plumbing fittings all of which have a common threaded tubular portion which mates with the threaded aperture of said housing.   
     
     
       2. The sensor as recited in claim 1 wherein said cap includes a threaded aperture extending therethrough; and further comprising an electrical coupling having a threaded tubular portion that is received in the aperture of said cap, the coupling being selected from a plurality of different types of electrical couplings all of which have a common threaded tubular portion which mates with the threaded aperture of said cap.   
     
     
       3. The sensor as recited in claim 1 further comprising: a first stop on the end portion of said housing; and   a second stop on the cap positioned to engage the first stop upon said housing and said cap being rotated with respect to each other.   
     
     
       4. The sensor as recited in claim 1 wherein said housing further includes means for restricting the movement of said coupling ring along said housing. 
     
     
       5. A sensor comprising: a housing having a cylindrical first end, and a second end having an aperture extending therethrough;   a transducer within said housing;   a cap having a cylindrical portion abutting the first end of the housing and having external threads on its cylindrical portion, said cap also having a threaded aperture extending therethrough;   a coupling ring engaging the first end of said housing and having threads which engage the external threads of the cap;   a pair of stops, one of which being on the housing and the other one on said end cap, said stops engaging each other when said cap and said housing are rotated with respect to each other;   an electrical coupling having a threaded tubular portion that is received in the aperture of said cap; and   a plumbing fitting having a threaded tubular portion that is received in the aperture of said housing.   
     
     
       6. The sensor as recited in claim 5 further comprising means for sealing the abutment between the housing and the end cap. 
     
     
       7. The sensor as recited in claim 5 further comprising an O-Ring extending around said housing spaced from the first end.